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S. B. CONOVER. Y

Elevator.

No. 226,981.- Patented Ap'r'l 27, 1880.

YW.. A MM.

. N.PETEHS, PNO`I0-LITHDGRAPHER. WASHINGTON, D. C.

NITED STATES PATENT OFFICE.

STEPHEN B. OONOVER, OF NEW YORK, N. Y., ASSIGNOR OF .ONE-THIRD OF HISRIGHT TO JOHN P. ELMENDORF, OF WESTOHESTER, NEW YORK.

ELEVATO R.

SPECIFICATION formingpart of Letters Patent No. 226,981, dated April 27,1880.

Application filed February 11, 1880.

To all whom it may concern Be it known that I, STEPHEN B. GoNovER, ofthe city, county, and State of New York, have invented a new and usefulImprovement in Elevators, which improvement is fully set forth in thefollowing specification, reference being had to the accompanyingdrawings, in which- Figure 1 represents a vertical central sec- Io tionof my elevator; Fig. 2 is a front view thereof.

Similar letters indicate corresponding parts.

My invention is adapted to all classes of elevators; and it consists inthe combination, with the car or platform of the apparatus, ofvertically-projecting lazy-tongs, the top and bottom limbs of which havea pivotal connection with the elevator-car and frame, respectively, andlifting mechanism connected to the lower 2o central pivot of thelazy-tongs, so that while the car may be readily elevated through themedium of the lazy-tongs the least amount of power is required for thatpurpose, owing to the operation of the lifting` mechanism in thedirection of movement of the car.

The lifting mechanism consists of a piston, Which is connected to thelower central pivot of the lazy-tongs and inclosed in a suitablecylinder, so th at the apparatus may be Worked 3o by the direct actionof a fluid under pressure.

In the drawings, the letter A designates the elevator car or platform, Bthe lazy-tongs, and O the lifting-piston.

The car A is arranged to move in vertical 3 5 guideways D D, and may beof any usual or suitable construction.

The lazy-ton gs B extend in a vertical direction, and are arranged intwo sets, connected together by traverses e, which constitute the 4opivots of the lazy-tongs, and are guided in the ways D D.

The top limbs of the lazy-tongs B areconnected to the elevator-car A bypivoted links f, while the bottom limbs of the lazy-tongs 4 5 areconnected to the elevator-frame by pivoted links f but if, desired, thelinks ff may be omitted, and the lazy-ton gs connected directly to thecar and frame. In this example the lower links, f', are connected to thebottom of the elevator-frame; but they can also be ad- 5o vantageouslyconnected to the sides of the frame above the bottom by pivots workingin suitable slots.

The lifting-piston O is connected to the lower central pivot, e, of thelazy-tongs by couplings g g, the piston being situated beneath thelazytongs, and the axis thereof being in the plane of the center of thelazy-tongs. Said piston O is fitted and works in a cylinder, H, to whichis connected a cock, whereby it .is adapted 6o to be supplied with wateror other iiuid under pressure for raising the piston. When the piston Crises it acts upon the lazy-tongs B to lift the elevator-car A in awe1lknown manner. 65

By the connection ofthe piston O to the lower central pivot, c, of thelazy-tongs the lifting power is applied at that point and operates inthe direction of movement of the car.

Heretofore lazy-tongs elevators have been 7o constructed in which theends of the upper limbs of the tongs have had a pivotal connection withthe carriage or car, and the depending free ends of the lower limbs havebeen connected with the ends of ropes or chains, which are passed arounda windlass, so that by turning the latter to wind up the ropes or chainsthefree ends of the lower limbs of the lazy-tongs will be drawn towardeach other, and the tongs' thereby extended, and the car- 8o riage orcar elevated, and thereby the entire lifting power is applied at theends ofthe limbs to draw such ends toward each other.

The old arrangement referred to leads to the expenditure of considerablepower for op- 8 5 erating the lazy-tongs, of which I effect ainaterialsaving by my arrangement of the lifting mechanism.

The cock I is a three-Way cock, and in one of its positions it allowsthe Huid, as Water or 9o steam, to enter the cylinder H for operatingthe piston O, while in another position it allows the iuid to escapefrom the cylinder.

It may be remarked that other mechanical equivalents may be substitutedfor the liftin g-piston and cylinder; but this mechanism is preferable,owing to the simplicity of its construction and operation.

I do not claim, broadly, the use of lazytongs in elevating apparatus,such being old; but

What I claim as new, and desire to secure by Letters Patent, is

l. In an elevator, the combination, with the lazy-tongs having the endsof the lower limbs provided with a pivotal connection with thestationary base of the elevator-frame and the ends of the upper limbsprovided with a pivotal connection with the car, of mechanism connectedwith the central pivot of the lower limbs and operating in the directionofthe movement of the car, and acting to forcibly lift the central pivotin a vertical path, substantially as and for the purpose described.

STEPHEN B. ooNovER. [n si Witnesses W. HAUFF, Guns. WAHLERS.

